Scraper



5 sheets-sheet l TTDR/v/EV L. E. SMITH Jly 17, 1934.

SCRAPER Original Filed March 2l, 1931 L. E. SMITH my i7, 1934.

SCRAPER Original Filed March 2l. 1931 3 Sheets-Sheet 2 N WWHHV L. E.SMITH my m w34 SCRAPER Original Filed March 2l. 1931 5 Sheets-Sheet 3/QTTDR/VE Patented July 17, 1934 SCBAPEB Lee E. Smith, Portland, Oreg.

.application March 21, 1931, Serial No. 524,301 Renewed December 13,1933 e (ci. sri-ia sihis invention relates generally to excavatingmachinery, and particularly to a scraper.

The main object ci this invention is the construction of a scraper whichwill handle dirt at 5 a low cost per yard.

The second object is to construct a scraper which will be easy tomaneuver and not readily capsized under ordinary working conditions.

The third object is the provision oi a scraper W@ which is adapted to bedrawn by a. tractor in which the load is carried free oi the ground andin which the "bite o1 the scraper, as well as its tipping action can becontrolled to a nicety.

. lThe fourth object is to eliminate the necessity ab oi backing up thescraper after each unloading for the-purpose of restoring it to itsoriginal position, as is commonly the practice.

These, and other objects, become more apparent from the specicationfollowing as illusn@ trated in the accompanying drawings, in which: Fig.1 is a side elevation oi the device showing the scraper in a latcliedcleaning up position.

Fig. 2 is a view similar to Fig. 1 but showing the scraper in. anunlatched position preparatory 2,? to dumping. u Fig. 3 is a Viewsimilar to Fig. 2 showing the scraper in a dumping position.

.c 4 is a section taken along the line 4 4 in 5 is a section taken alongthe line 5 5 in 2.

6 is a section taken along the line 3 6 in Fig. 4.

Fig. 7 is a plan ci the device.

Fig. 3 is a vertical section along the line 8--3 in Fi 7.

imilar numbers of reference refer to similar parts throughout theseveral views.

Referring in detail to the drawings, there is` shown a low spaced frame10 joined at its rearward end by means of the cross tie 1l and at itsforward end by means of the cross tie 12. The irame l is turned inwardlyand joined to form a tongue 13 by means of which it may be at- 5 tachedto the draw bar ci a tractor by means of a universal connection 14 andclevis 15. The rear end of the frame 10 is supported by a pair of widewheels 16 on an axle 17 which passes through the side frame 10. The axle17 is further supported at an intermediate point by a longitudinalmember 13 which is secured at the rearward end to the cross tie 11 andat the forward end to the auxiliary cross tie 19.

Secured to the under side oi. each frame is a 55 horizontal guide 20 inwhich'is mounted a slide 2l. On each side frame 10 is secured a standard22 from which projects inwardly the trunnion 23. The trunnion 23projects into an arcuate slot 24 whose curve is struck from the centerof the bolt 25 in the slide 21, in the position shown in Fig. 1. Theslot 24 is formed in the side 26 of the scraper bucket whose bottom edge27 is provided with teeth 28 which also serve as runners for the underside of the bucket. The rear edge 29 is curved to ioin the bottom 27.The forward side edges of the bucket are provided with runners 30 whichcurve upwardly and backwardly above the bucket top 3l, as shown in Fig.l.

1t is desirable to provide stilening braces 32 between the middle of theback 29 and the top ,m front corners of the sides 26. There is alsoprovided a central brace 33 which ties the middle of the upper edge ofthe back 29 to the middle of the forward portion or the bottom 27.

On the rearward side of each frame l0 is mounted a bracket 34 to each ofwhich is hinged one 75 end of a hydraulic cylinder 35 whose piston 36 ishingedly connected to the side 26 of the bucket by means of the bolt 37.The position of the bolt 37 is approximately in the arc of the curvedslot 24 and a short distance in back of the rear s@ end thereof. Each ofthe slots 24 has an upturned portion 33 whose purpose will be explainedlater. Flexible luid lines 39 and 40 extend from each hydraulic cylinder35 to a control point on the tractor 4l.

Each slide 21 is joined by a connecting link 42 and the bolts 25 and 43Ato a plate 43 which is secured to its respective bucket side 26. Theslides 2l are held in their extreme forward position (as shown in rig.i) by means of the arching 9 levers 44 which are pivotally mounted onthe pins 45 and are urged into engagement with the slides 2l by means ofthe springs 46. The latching levers 24 are rendered operative by thebell crank levers 47 which are mounted on the side frames 10 by means ofthe bolt 48. The bell crank levers 47 are operated by the pull rods 49which, in turn, are connected to the levers 50 on the shaft 51, whichshaft extends across the front of the frames 10 and is provided with alever 52 at its middle portion, which lever 52 the single pull rod 53connects to the lever 54 which is operated by a rope 55 from the tractor41. In other words, the pull on the rope 55 will unlatch the slides 21permitting same to move rearwardly.

' The operation of the device is substantially as follows: Assuming theparts to be in the position shown in Fig. 1, that is, in which the teeth28 are just skimming the ground 56, and it is desired to no load thescraper, and in this position the bucket is supported by the trunnions23 which are within the slots 24. In other words, the bucket would swingon the trunnions were it not for the fact that it is held by the pistons36 of the hydraulic cylinders 35, and the slides 2l which are held intheir forward position by the latching levers 44. In order to load thebucket it is of course necessary to move the tractor 41 forward and atthe 'same time force fluid through the lines 39 into the cylinderscausing the bucket to swing on the centers of the bolts 25, lowering theteeth 28 and tipping up the back end 29 of the bucket in proportion tothe movement of the pistons 36.

If it is desired to discharge the bucket it is only necessary to pull onthe rope 55 which will unlatch the slides 21 and, through the action ofthe cylinders 35, reverse the movement of the bucket to the positionshown in Fig. 2-that is with the trunnions 23 occupying the upturnedslots 38. Pressure is again applied to the rear end of the cylinders 35causing the bucket to rock on a new center, namely the trunnions 23, andthe now free slides 21 move backwardly along the guides 20. Obviously,the tilt of the bucket can be controlled to a nicety by the operation ofthe cylinders 35. In order to return the bucket from the unloadingposition shown in Fig. 3 to the position shown in Fig. 1 it is firstnecessary to admit fluid to the forward end of the cylinders 35, causingthe bucket to first rock to the position shown in Fig.

2 on the centers of the trunnions 23 which now occupy the upturned slotportions 38 until the slides 2l are automatically latched under theaction of the springs 46. 'I'he action of the pistons 36 is now reversedcausing the bucket to shift on new centers, namely the bolts 43--A andcausing the trunnions 23 to leave the upturned portions 38 and enter thecurved portions 24 thereof (as shown in Fig. 1) thereby restoring it toits original position. Obviously, the precise manner of handling thebucket will vary considerably according to the working conditions, butit can be readily seen that by this construction there is provided ascraper whose load is carried free of the ground and which can beunloaded and restored to its traveling position without backing or inany way moving the tractor or the supporting vehicle of the scraper.

I am of course aware that there are many forms of excavating devicesemploying dumping buckets mounted on land traveling vehicles; Itherefore do not intend to cover such devices broadly, but I do intendto cover all such forms and modifications thereof as fall fairly withinthe appended claims:

I claim:

l. A scraper having in combination a land traveling vehicle including apair of spaced side frames, a bucket tiltably mounted between said sideframes, said bucket having arcuate slots formed in the side thereof,said side frames having inturned trunnions engaging said slots, saidslots having the forward ends thereof upturned, said side frames havingguides formed on same, a slide in each guide, a connecting rod from eachslide to the forward end of the bucket, latch means for holding saidslides in their foremost positions, and a pair of hydraulically operatedpistons connected to said bucket behind said arcuate slots.

2. In a scraper, the combination of a land traveling vehicle having apair of spaced side frames provided with longitudinal parallel guides, aslide in each of said guides, a spring latch for holding each of saidguides in a forward position, a bucket mounted between said side frameshaving arcuate slots formed in the sides thereof, each of said slotshaving an upturned forward end, said side frames having trunnionsextending into said slots, the forward lower edges of said bucket havinglinks attached thereto whose rearward ends are attached to said slides,and hydraulic cylinders hingedly mounted one over the rear end of eachside frame and having the pistons thereof attached to the sides of saidbucket in the path of said arcuate slots behind the rearmost endsthereof.

3. A scraper bucket having an open front and top and having closedsides, said closed sides having arcuate slots formed therein struck froma center behind the fore and aft center of the bucket and close to thebottom thereof, each of said arcuate slots having its front endupturned, said bucket having means for attaching a link to the lowerforward portion of each side thereof, and means for attaching anoperating piston to each side thereof in the path of said arcuatev slotsopposite from their upturned ends.

4. The substance matter of claim 3, and a pair of runners secured to theforward edges of the sides of the bucket along the upper portion thereofand having the rounded upper ends curving backwardly over the sides ofthe bucket.

5. In a scraper the combination of a land traveling vehicle having apair of side frames, each of said side frames having longitudinal guidesformed along same, a slide in each guide, a latch adapted to hold eachof said slides in a forward position, means for releasing said latchessimultaneously under the manual control of the operator, a bucketrockably mounted between said side frames having hydraulic means forrocking same whereby a latched position of said slides will cause aforward rocking of said bucket to move same to a digging position and anunlatched position of said slides with a similar forward movement ofsaid bucket will cause same to discharge the contents thereof.

6. A scraper having in combination a wheeled vehicle having an upperstationary axis and a lower horizontally slidable axis, a bucket havingrocker mountings for both of said axes, and selective means for rockingsaid bucket on either of said axes whereby said bucket may tilt forwardon the lower axis for digging or on the upper axis for dumpingconsisting of a latch for holding said bucket to rock on its lower axisor to permit same to rock on its upper axis, together with hydrauliccylinders for rocking said bucket about its respective axes.

7. A scraper having in combination a wheeled vehicle having an upwardlyand forwardly disposed stationary axis and a lower and rearwardlydisposed horizontally slidable axis, a bucket having rocker mountingsfor both of said axes, and selective means for rocking said bucket oneither of said axes whereby said bucket may tilt forwardly on its loweraxis in its foremost position for digging purposes and on its upper axisfor dumping purposes consisting of a latch for holding said bucket torock on its lower axis or to permit same to rock on its upper axis,together with hydraulic cylinders for rocking said bucket about itsrespective axes.

8. A scraper having in combination a wheeled vehicle having an upwardlyand forwardly disposed stationary axis and a rearwardly disposedhorizontal axis capable of movement in a horisontai plane, latch meansfor normally holding said iower axis in a forward position, a buckethaving rocker mountings for both of said axes, and selective means forrocking said bucket on either of said axes whereby said bucket may tiltforwardly on the lower rearmost axis for digging, said upper axis beingslidabiy relative to the LEE E. SMITH.

